如何在cakephp中使用输出缓冲ob_start？

I have been trying to implement caching via out buffers. I have used that approach in PHP but I am stuck as where to start buffering i.e. (1). where to put ob_start() in controller (2). How to send buffer data to views

Thanks in advance

(1). where to put ob_start() in controller

No where. The View class already uses output buffering.

(2). How to send buffer data to views

You don't. The View is supposed to generate the response for you. You set required view vars from controller that are needed by View to generate the response.